[Springframework-developer] (no subject)

[Jean-Francois C. <cor...@ro...>]

Hi,

I have been lurking on this list for a while.  And I am currently 
experimenting with Spring 0.9.

In a recent email, Juergen asked for feedback from people using Spring.  
Here goes.

In my application, I wanted to have something like a Wizard when a user is 
filling a form.  I used the AbstractWizardFormController.

My form object contains a collection.  Using the wizard, I would like that 
one step allowed the user to add an arbitrary number of items to the 
collection. So each time a user adds an item, the same step is displayed so 
that he can continue adding. When he is finished he just presses the Next 
or Finish Button.

I have modified the petclinic application to see how I could do this with 
Spring.  I modified the AddOwnerForm so that when a Owner is Added his pets 
can also be added.  What I did is add a second step where a Pet can be 
created.  On this steps there are the standard Prev, Cancel and Finish 
Buttons.  But there is also a Add button to add the pet to the owner.  The 
add button points to the current wizard step.

I modified the onBindAndValidate() method to check for the presence of the 
_target1 attribute for page1. If it is there, it means that the user has 
pressed the Add button. I create a pet and add it to the owner. It kinda 
works, but is a bit klunky. I do not like the fact that I had to hard code 
"_target1" to make this work.

Is there a better way to do this?

English is not my first language, so my explanation may not be clear.  Just 
ask and I will explain further.

Thanks
Jean-Francois Cormier






Here is the code to the AddOwnerAndPetForm


/*
 * Created on 2-Jul-2003
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package petclinic.web;

import java.io.IOException;
import java.util.Date;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import petclinic.Clinic;
import petclinic.Owner;
import petclinic.Pet;

import com.interface21.validation.BindException;
import com.interface21.validation.Errors;
import com.interface21.web.servlet.ModelAndView;
import com.interface21.web.servlet.mvc.AbstractWizardFormController;


/**
 * @author jxc170
 *
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class AddOwnerAndPetsForm extends AbstractWizardFormController {


	private Clinic clinic;
	
	public AddOwnerAndPetsForm() {
		setCommandClass(Owner.class);				
	}
	
	
	/* (non-Javadoc)
	 * @see 
com.interface21.web.servlet.mvc.AbstractWizardFormController#validatePage(java.lang.Object, 
 com.interface21.validation.Errors, int)
	 */
	protected void validatePage(Object command, Errors errors, int page) {
		// TODO Auto-generated method stub
		logger.debug("Validate Page:" + page);
	}

	/* (non-Javadoc)
	 * @see 
com.interface21.web.servlet.mvc.AbstractWizardFormController#processFinish(javax.servlet.http.HttpServletRequest, 
 javax.servlet.http.HttpServletResponse, java.lang.Object, 
com.interface21.validation.BindException)
	 */
	protected ModelAndView processFinish(HttpServletRequest 
request,HttpServletResponse response,Object command,BindException errors) 
	throws ServletException, IOException {
		Owner owner = (Owner) command;

		getClinic().insert(owner);
				

		List pets = owner.getPets();
		Object[] petArray = pets.toArray();
		for ( int i = 0; i < petArray.length; i++) {
			Pet pet = (Pet) petArray[i];
			pet.setOwner(owner);
			getClinic().insert(pet);			
		}

		return new ModelAndView("ownerRedirect", "ownerId", 
Integer.toString(owner.getId()));				
		
	}
	
	/* (non-Javadoc)
	 * @see 
com.interface21.web.servlet.mvc.AbstractWizardFormController#referenceData(javax.servlet.http.HttpServletRequest, 
 java.lang.Object, com.interface21.validation.Errors, int)
	 */
	protected Map referenceData(HttpServletRequest request,Object 
command,Errors errors,int page) throws ServletException {
		Map model = new HashMap();
		System.out.println("\n\n\n+++++++++++++++++++++++++++++++++++++++++++\n\n\n") 
;
		System.out.println(" GETTING TYPES ");
		Map types = clinic.getTypes();
		System.out.println("\n\n\n+++++++++++++++++++++++++++++++++++++++++++\n\n\n") 
;
		model.put("types", types);

		return model;
	}

	/* (non-Javadoc)
	 * @see 
com.interface21.web.servlet.mvc.AbstractWizardFormController#processCancel(javax.servlet.http.HttpServletRequest, 
 javax.servlet.http.HttpServletResponse, java.lang.Object, 
com.interface21.validation.BindException)
	 */
	protected ModelAndView processCancel(
		HttpServletRequest request,
		HttpServletResponse response,
		Object command,
		BindException errors)
		throws ServletException, IOException {			
		// TODO Auto-generated method stub
		logger.debug("Wizard Canceled");
		return null;
	}
	
	/* (non-Javadoc)
	 * @see 
com.interface21.web.servlet.mvc.AbstractWizardFormController#onBindAndValidate(javax.servlet.http.HttpServletRequest, 
 java.lang.Object, com.interface21.validation.BindException, int)
	 */
	protected void onBindAndValidate(HttpServletRequest request,Object 
command,BindException errors,int page) throws ServletException {
		logger.debug("On Bind and Validate Page:" + page);
		switch (page) {
			case 0:
				break;
			case 1:
				if ( request.getParameter("_target1") != null ) {
					String petName = request.getParameter("name");
					String petBirthDate = request.getParameter("birthDate");
					String type = request.getParameter("typeId");
					if ( petName != null ) {				
						Pet pet = new Pet();
						pet.setName(petName);
						int year = Integer.parseInt(petBirthDate.substring(0,4));
						int month = Integer.parseInt(petBirthDate.substring(5,7));
						int day = Integer.parseInt(petBirthDate.substring(8,10));										
						pet.setBirthDate(new Date(year, month, day));
						pet.setTypeId(Integer.parseInt(type));
						Owner owner = (Owner) command;				
						owner.addPet(pet);
					}		
				}				
				break;
			default:
				break;		
		}
	}


	/**
	 * @return
	 */
	public Clinic getClinic() {
		return clinic;
	}

	/**
	 * @param clinic
	 */
	public void setClinic(Clinic clinic) {
		this.clinic = clinic;
	}

}